The first phase of the SYNCHRO Project, a study on bioenergetics and motion analysis of synchronized swimming, started last 26-27th of February during the Spanish Championships held in Barcelona. A team of 17 researchers collected beat-to-beat heart rates, serial blood lactate samples, RPE scale scores, and high-quality, 25 frames/second video recordings during 97 different technical and free competitive routines (solos, duets and teams) on 33 swimmers. European, World and Olympic medalists, and the swimmers preparing this year’s Worlds in Shanghai and London 2012 Olympics were among the participants. We are grateful to all swimmers, coaches, judges, RFEN technical staff, and event organizers (Club Natació Barcelona, CN Kallipolis) for their fine help and collaboration with our team throughout this unique field study. Now… lots of data to analyze and interpret!!!